Sometimes marketing just gets in the way of a good product.
The Forever chair is a stool designed for interaction between people. On a personal level, the stool lets you slide another similar stool from under the one you are sitting on, thus sending the message "sit next to me".
From a symbolic angle, once these male and female stools are manufactured, they will always be together - "forever".
Materials? Price? Don't know. But now we know that stools have sexes, and mate.